operate as a quantum bit, or qubit. The phase qubit is closely related, yet distinct from, the flux qubit and the charge qubit, which are also quantum bits...

electronic circuits using superconducting qubits as artificial atoms, or quantum dots. For superconducting qubits, the two logic states are the ground state...

In quantum computing, a qubit (/ˈkjuːbɪt/) or quantum bit is a basic unit of quantum information—the quantum version of the classic binary bit physically...

In quantum computing, a charge qubit (also known as Cooper-pair box) is a qubit whose basis states are charge states (i.e. states which represent the presence...

specifically in superconducting quantum computing, flux qubits (also known as persistent current qubits) are micrometer sized loops of superconducting metal...

{\displaystyle m} -qubit register. The eigenvalues of a unitary operator have unit modulus, and are therefore characterized by their phase. Thus if | ψ ⟩...

logical qubit from any arbitrary single qubit error. In this code, 5 physical qubits are used to encode the logical qubit. With X {\displaystyle X} and Z {\displaystyle...

superconducting quantum computing, a transmon is a type of superconducting charge qubit designed to have reduced sensitivity to charge noise. The transmon was developed...

applied to induce coupling between the qubit states (for single qubit operations) or coupling between the internal qubit states and the external motional states...

The spin qubit quantum computer is a quantum computer based on controlling the spin of charge carriers (electrons and electron holes) in semiconductor...

(target) qubit is conditioned on the state of the first (control) qubit. Because the phase of the second qubit is being “kicked back” to the first qubit, this...

quantum gate) is a basic quantum circuit operating on a small number of qubits. Quantum logic gates are the building blocks of quantum circuits, like classical...

words, the Shor code can correct any combination of bit or phase errors on a single qubit. More generally, the error operator U does not need to be unitary...

In quantum computing, a qubit is a unit of information analogous to a bit (binary digit) in classical computing, but it is affected by quantum mechanical...

states. When measuring a qubit, the result is a probabilistic output of a classical bit. If a quantum computer manipulates the qubit in a particular way,...

property enabled the resonator to be coupled with a superconducting phase qubit, a device used in quantum computing whose quantum state can be accurately...

described a new device that can represent a logical qubit with hardware stability, measuring a phase of matter consistent with the observation of topological...

quantum devices. Some of these proposals involve using superconducting qubits, trapped ions, liquid and solid state nuclear magnetic resonance, or optical...

providing a way for a sender and receiver to simulate a noiseless qubit channel given a noisy qubit channel whose noise conforms to a particular error model....

information. An example of quantum information is the general dynamics of a qubit. An example of classical information is a text document transmitted over...

surface code would require approximately 1,000-10,000 physical qubits per logical data qubit, though more pathological error types could change this figure...

encoded qubits efficiently with respect to the accuracy achieved, and can make LOQC fault-tolerant for photon loss, detector inefficiency and phase decoherence...

a gate is applied to target qubits by first applying the gate to an entangled state and then teleporting the target qubits through that entangled state...

the states of the qubits. Also, after Bob has received the qubits, we know that Eve cannot be in possession of a copy of the qubits sent to Bob, by the...

the no-cloning theorem: if it were possible to convert a qubit into classical bits, then a qubit would be easy to copy (since classical bits are trivially...

a type of highly entangled state of multiple qubits. Cluster states are generated in lattices of qubits with Ising type interactions. A cluster C is a...

demonstrate a 48 logical qubit processor. To perform computation, the atoms are first trapped in a magneto-optical trap. Qubits are then encoded in the...

more qubits than available in the near future. Another concern is that noise in quantum circuits may undermine results, requiring additional qubits for...

\sigma _{y}} measurement upon Charlie's qubit. Indeed, this same logic applies to both measurements and all three qubits. Per the EPR criterion of reality,...

0.66. Three qubits are required for this process: the source qubit from the sender, the ancillary qubit, and the receiver's target qubit, which is maximally...